Gun cabinet



FIG. 1 is a front elevational view of a gun cabinet showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view; and

FIG. 6 is a bottom view thereof. 

The ornamental design for a gun cabinet, substantially as shown and described. 